若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 01:09:18
若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的

若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为
若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为

若1/a-1/b=3,则分式2a+3ab-2b/a-2ab-b的值为
1/a-1/b=3
(b-a)/ab=3
b-a=3ab
2a+3ab-2b/a-2ab-b
=(-2(b-a)+3ab)/(-(b-a)-2ab)
=(-6ab+3ab)/(-3ab-2ab)
=-3ab/-5ab
=3/5

由1/a-1/b=3得:(b-a)/ab=3,b-a=3ab,a-b=-3ab
(2a+3ab-2b)/(a-2ab-b)
=(2a-2b+3ab)/(a-b-2ab)
=(6ab+3ab)/(-3ab-2ab)
=9ab/(-5ab)/=-9/5
你若满意,请及时采纳!